Değişik geometrilere sahip enerji sönümleyici profillerin açılı yükler altında performanslarının incelenmesi

Murat Altin
305 72

Öz


Otomobillerde kullanılan ve tampon üzerinde yer alan enerji sönümleyici profiller önden ve arkadan çarpmalı kazalarda ortaya çıkan kinetik enerjiyi deforme olarak sönümleyebilme yeteneğine sahip bağlantı elemanlarıdır. Bir kaza anında enerji sönümleyici profillerin maruz kaldıkları darbe kuvvetlerini yeterince sönümleyememesi bu kuvvetlerin direkt olarak araç içerisindeki yolcu bölümüne aktarılmasına sebebiyet verecektir. Yapılan çalışma kapsamında kare ve dairesel kesitli değişik geometrik özelliklere sahip on adet enerji sönümleyici tasarımı gerçekleştirilerek farklı açılardaki yükler altında enerji sönümleme performansları sonlu elemanlar yöntemi ile incelenmiştir. Enerji sönümleyici profiller 0°, 15° ve 30°’lik açıya sahip rijit bir plaka ile 120 mm boyunca deformasyona uğratılmıştır. Yapılan analizler ile her bir enerji sönümleyici profil için özgül enerji sönümleme ve ezilme kuvveti verimi değerleri incelenmiştir. Elde edilen sonuçlara göre her durumda dairesel kesitli enerji sönümleyicilerin daha yüksek performans sağladığı tespit edilmiştir.


Anahtar kelimeler


Enerji sönümleyici profil, Açılı deformasyon, Ls-Dyna, Ezilme kuvveti verimi, Özgül enerji sönümleme

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Referanslar


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